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�������պ����ѧѧ�� 2006, Vol. 32 Issue (03) :333-336    DOI:
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����ǿ1, ������1, ���1, ����ޱ2*
1. �������պ����ѧ ������Ϣ����ѧԺ, ���� 100083;
2. ����ʱ�ո���ؿƼ����޹�˾, ���� 100038
Design of delay mapping receiver for GPS remote sensing
Zhang Yiqiang1, Zhang Qishan1, Yang Dongkai1, Li Ziwei2*
1. School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. Beijing Spatial Port Geosystems Co Ltd, Beijing 100038, China

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ժҪ ȫ�����Ƕ�λϵͳGPS(Global Positioning System)�㷺Ӧ���ڶ�λ�͵���,�������ú����GPS�źŲ�����ɢ��ЧӦ����΢��ң��,��һ������΢��ң���ֶ�.���Ƚ�����GPS����ң�в�缼�������������ص�,������GPSɢ���źŲ����������ۻ���,�ص�������ӳ�ӳ����ջ��������߲����ź�����ȡ�˫��Ƶǰ�˵�·��ơ����㷴����ӳ١����ջ�����ģʽ����Ƕ��������5��ؼ�����.��Ƶ��ӳ�ӳ����ջ�������������������״δ��ط�������,����������,�ӳ�ӳ����ջ���ͬʱ����ֱ��ͺ���ɢ�������źŲ����������λ��,��ȷ���㾵��ɢ������ӳ�,׼ȷ���պ���ɢ���GPS�����ź�,��ɢ���ź�����ȴﵽ��14.9?dB����,���ջ����Ϊ���ݺ���糡�ṩ��׼ȷ�Ļ�������,���ַ�ʽ���ƹ㵽ң��̽��½������ʪ�ȡ�������ȡ����˸߶ȵ�����.
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Abstract�� Signals of global positioning system (GPS) can be used for purposes such as navigation and positioning. The utility of scattered GPS signals from rough surfaces brings a new technology for microware remote sensing. Background and advantage of GPS based sea surface wind remote sensing technique and scattered GPS signal measurement technique was introduced. Five main techniques were discussed such as improving the signal noise ratio, dual radio frequency front-end circuit design, calculating the specular point code delay, receiver work mode and the embedded firmware process. Data collection campaigns were done at Tianjin near sea with the receiver mounted on an airplane. Results show that the receiver can simultaneously receive direct and ocean scattered GPS signal, correctly calculate specular point delay, successfully measure the ocean scattered signals correlation power around the specular point, and signal noise ratio is higher than 14.9?dB. Receiver outputs provide basic data sets for ocean wind retrieval. The technique can also be used in land moist sensing, sea ice age sensing, ocean wave height remote sensing.
Keywords�� globe position system   remote sensing   reflection     
Received 2005-04-08;


About author: ����ǿ(1974-),��,�ӱ�������,��ʿ��, zhangyiqiang@tom.com.
����ǿ, ������, ���, ����ޱ.����GPSң�е��ӳ�ӳ����ջ��ؼ�����[J]  �������պ����ѧѧ��, 2006,V32(03): 333-336
Zhang Yiqiang, Zhang Qishan, Yang Dongkai, Li Ziwei.Design of delay mapping receiver for GPS remote sensing[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2006,V32(03): 333-336
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